#activation-induced_cytidine_deaminase
Activation-induced cytidine deaminase
Enzyme that creates mutations in DNA
Activation-induced cytidine deaminase, also known as AICDA, AID and single-stranded DNA cytosine deaminase, is a 24 kDa enzyme which in humans is encoded by the AICDA gene. It creates mutations in DNA by deamination of cytosine base, which turns it into uracil. In other words, it changes a C:G base pair into a U:G mismatch. The cell's DNA replication machinery recognizes the U as a T, and hence C:G is converted to a T:A base pair. During germinal center development of B lymphocytes, error-prone DNA repair following AID action also generates other types of mutations, such as C:G to A:T. AID is a member of the APOBEC family.
Wed 21st
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